| Title | AGN Feedback and Star Formation of Quasar Host Galaxies: Insights from the Molecular Gas |
| Authors | Shangguan, Jinyi Ho, Luis C. Bauer, Franz E. Wang, Ran Treister, Ezequiel |
| Affiliation | Max Planck Inst Extraterr Phys MPE, Giessenbachstr, D-85748 Garching, Germany Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China Pontificia Univ Catolica Chile, Fac Fis, Inst Astrofis, Casilla 306, Santiago 22, Chile Pontificia Univ Catolica Chile, Fac Fis, Ctr Astroingn, Casilla 306, Santiago 22, Chile Millennium Inst Astrophys MAS, Nuncio Monsenor Sotero Sanz 100, Santiago, Chile Space Sci Inst, 4750 Walnut St,Suite 205, Boulder, CO 80301 USA |
| Keywords | SUPERMASSIVE BLACK-HOLES ACTIVE GALACTIC NUCLEI TULLY-FISHER RELATION INTRINSIC SCATTER STELLAR OBJECTS LUMINOSITY AGN NO EVIDENCE ATOMIC GAS MASS EVOLUTION |
| Issue Date | Aug-2020 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Abstract | Molecular gas serves as a key probe of the complex interplay between black hole accretion and star formation in the host galaxies of active galactic nuclei (AGNs). We use CO(2-1) observations from a new Atacama Large Millimeter/submillimeter Array survey, in conjunction with literature measurements, to investigate the molecular gas properties of a representative sample of 40z < 0.3 Palomar-Green quasars, the largest and most sensitive study of molecular gas emission to date for nearby quasars. We find that the AGN luminosity correlates with both the CO luminosity and black hole mass, suggesting that AGN activity is loosely coupled to the cold gas reservoir of the host. The observed strong correlation between host galaxy total infrared luminosity and AGN luminosity arises from their common dependence on the molecular gas. We argue that the total infrared luminosity, at least for low-redshift quasars, can be used to derive reliable star formation rates for the host galaxy. The host galaxies of low-redshift quasars have a molecular gas content similar to that of star-forming galaxies of comparable stellar mass. Moreover, they share similar gas kinematics, as evidenced by their CO Tully-Fisher relation and the absence of detectable molecular outflows down to sensitive limits. There is no sign that AGN feedback quenches star formation for the quasars in our sample. On the contrary, the abundant gas supply forms stars prodigiously, at a rate that places most of them above the star-forming main sequence and with an efficiency that rivals that of starburst systems. |
| URI | http://hdl.handle.net/20.500.11897/591440 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/aba8a1 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 物理学院 |
